US 12,338,349 B2 · Heterocyclic red azo colorants for seed treatment applications

Abstract

This invention relates to heterocyclic red azo colorants for seed treatment applications. The red azo colorants contain a heterocycle that includes one nitrogen atom and one sulfur atom and are free from electron-withdrawing groups on the heterocycle. Seeds for use in horticultural/agriculture applications that are coated with the heterocyclic azo colorants provide anti-counterfeiting properties to the coated seeds. A color change phenomenon is observed when the coated seeds are exposed to an acidic material, such as vinegar, and provides evidence of the authenticity of the coated seeds. The invention also relates to agricultural formulations containing the heterocyclic red azo colorants that can be used as an anti-counterfeit agents.

Claims21

Dependent claims

A composition comprising:

(a) an agricultural formulation that includes at least one agricultural active ingredient, and
(b) at least one red azo colorant represented by the following formula:
wherein R1 is a heterocyclic group comprising at least one 5 membered ring incorporating one N and one S atom within the ring system, and wherein the heterocyclic group is free from electron-withdrawing groups;
R2 and R3 are independently selected from the group consisting of H, alkyl, and poly(oxyalkylene) moieties, wherein at least one of R2 and R3 is a poly(oxyalkylene) moiety;
and
R4 is independently selected from the group consisting of H, alkyl, substituted alkyl, substituted nitrogen, hydroxyl, halogens and ethers.

3 more elements

Dependencies are inferred from the claim text.

Heterocyclic red azo colorants for seed treatment applications

Life of this patent

Heterocyclic red azo colorants for seed treatment applications

Life of this patent

Abstract

Claims21